Setting the environment
library(tidyverse)
library(caret)
load("./data/Datasets.RData")
Descriptive statistics
summary(training_Data)
## X user_name raw_timestamp_part_1
## Min. : 1 Length:19622 Min. :1.322e+09
## 1st Qu.: 4906 Class :character 1st Qu.:1.323e+09
## Median : 9812 Mode :character Median :1.323e+09
## Mean : 9812 Mean :1.323e+09
## 3rd Qu.:14717 3rd Qu.:1.323e+09
## Max. :19622 Max. :1.323e+09
##
## raw_timestamp_part_2 cvtd_timestamp new_window
## Min. : 294 Length:19622 Length:19622
## 1st Qu.:252912 Class :character Class :character
## Median :496380 Mode :character Mode :character
## Mean :500656
## 3rd Qu.:751891
## Max. :998801
##
## num_window roll_belt pitch_belt yaw_belt
## Min. : 1.0 Min. :-28.90 Min. :-55.8000 Min. :-180.00
## 1st Qu.:222.0 1st Qu.: 1.10 1st Qu.: 1.7600 1st Qu.: -88.30
## Median :424.0 Median :113.00 Median : 5.2800 Median : -13.00
## Mean :430.6 Mean : 64.41 Mean : 0.3053 Mean : -11.21
## 3rd Qu.:644.0 3rd Qu.:123.00 3rd Qu.: 14.9000 3rd Qu.: 12.90
## Max. :864.0 Max. :162.00 Max. : 60.3000 Max. : 179.00
##
## total_accel_belt kurtosis_roll_belt kurtosis_picth_belt kurtosis_yaw_belt
## Min. : 0.00 Min. :-2.121 Min. :-2.190 Mode:logical
## 1st Qu.: 3.00 1st Qu.:-1.329 1st Qu.:-1.107 NA's:19622
## Median :17.00 Median :-0.899 Median :-0.151
## Mean :11.31 Mean :-0.220 Mean : 4.334
## 3rd Qu.:18.00 3rd Qu.:-0.219 3rd Qu.: 3.178
## Max. :29.00 Max. :33.000 Max. :58.000
## NA's :19226 NA's :19248
## skewness_roll_belt skewness_roll_belt.1 skewness_yaw_belt
## Min. :-5.745 Min. :-7.616 Mode:logical
## 1st Qu.:-0.444 1st Qu.:-1.114 NA's:19622
## Median : 0.000 Median :-0.068
## Mean :-0.026 Mean :-0.296
## 3rd Qu.: 0.417 3rd Qu.: 0.661
## Max. : 3.595 Max. : 7.348
## NA's :19225 NA's :19248
## max_roll_belt max_picth_belt max_yaw_belt min_roll_belt
## Min. :-94.300 Min. : 3.00 Min. :-2.10 Min. :-180.00
## 1st Qu.:-88.000 1st Qu.: 5.00 1st Qu.:-1.30 1st Qu.: -88.40
## Median : -5.100 Median :18.00 Median :-0.90 Median : -7.85
## Mean : -6.667 Mean :12.92 Mean :-0.22 Mean : -10.44
## 3rd Qu.: 18.500 3rd Qu.:19.00 3rd Qu.:-0.20 3rd Qu.: 9.05
## Max. :180.000 Max. :30.00 Max. :33.00 Max. : 173.00
## NA's :19216 NA's :19216 NA's :19226 NA's :19216
## min_pitch_belt min_yaw_belt amplitude_roll_belt amplitude_pitch_belt
## Min. : 0.00 Min. :-2.10 Min. : 0.000 Min. : 0.000
## 1st Qu.: 3.00 1st Qu.:-1.30 1st Qu.: 0.300 1st Qu.: 1.000
## Median :16.00 Median :-0.90 Median : 1.000 Median : 1.000
## Mean :10.76 Mean :-0.22 Mean : 3.769 Mean : 2.167
## 3rd Qu.:17.00 3rd Qu.:-0.20 3rd Qu.: 2.083 3rd Qu.: 2.000
## Max. :23.00 Max. :33.00 Max. :360.000 Max. :12.000
## NA's :19216 NA's :19226 NA's :19216 NA's :19216
## amplitude_yaw_belt var_total_accel_belt avg_roll_belt stddev_roll_belt
## Min. :0 Min. : 0.000 Min. :-27.40 Min. : 0.000
## 1st Qu.:0 1st Qu.: 0.100 1st Qu.: 1.10 1st Qu.: 0.200
## Median :0 Median : 0.200 Median :116.35 Median : 0.400
## Mean :0 Mean : 0.926 Mean : 68.06 Mean : 1.337
## 3rd Qu.:0 3rd Qu.: 0.300 3rd Qu.:123.38 3rd Qu.: 0.700
## Max. :0 Max. :16.500 Max. :157.40 Max. :14.200
## NA's :19226 NA's :19216 NA's :19216 NA's :19216
## var_roll_belt avg_pitch_belt stddev_pitch_belt var_pitch_belt
## Min. : 0.000 Min. :-51.400 Min. :0.000 Min. : 0.000
## 1st Qu.: 0.000 1st Qu.: 2.025 1st Qu.:0.200 1st Qu.: 0.000
## Median : 0.100 Median : 5.200 Median :0.400 Median : 0.100
## Mean : 7.699 Mean : 0.520 Mean :0.603 Mean : 0.766
## 3rd Qu.: 0.500 3rd Qu.: 15.775 3rd Qu.:0.700 3rd Qu.: 0.500
## Max. :200.700 Max. : 59.700 Max. :4.000 Max. :16.200
## NA's :19216 NA's :19216 NA's :19216 NA's :19216
## avg_yaw_belt stddev_yaw_belt var_yaw_belt
## Min. :-138.300 Min. : 0.000 Min. : 0.000
## 1st Qu.: -88.175 1st Qu.: 0.100 1st Qu.: 0.010
## Median : -6.550 Median : 0.300 Median : 0.090
## Mean : -8.831 Mean : 1.341 Mean : 107.487
## 3rd Qu.: 14.125 3rd Qu.: 0.700 3rd Qu.: 0.475
## Max. : 173.500 Max. :176.600 Max. :31183.240
## NA's :19216 NA's :19216 NA's :19216
## gyros_belt_x gyros_belt_y gyros_belt_z
## Min. :-1.040000 Min. :-0.64000 Min. :-1.4600
## 1st Qu.:-0.030000 1st Qu.: 0.00000 1st Qu.:-0.2000
## Median : 0.030000 Median : 0.02000 Median :-0.1000
## Mean :-0.005592 Mean : 0.03959 Mean :-0.1305
## 3rd Qu.: 0.110000 3rd Qu.: 0.11000 3rd Qu.:-0.0200
## Max. : 2.220000 Max. : 0.64000 Max. : 1.6200
##
## accel_belt_x accel_belt_y accel_belt_z magnet_belt_x
## Min. :-120.000 Min. :-69.00 Min. :-275.00 Min. :-52.0
## 1st Qu.: -21.000 1st Qu.: 3.00 1st Qu.:-162.00 1st Qu.: 9.0
## Median : -15.000 Median : 35.00 Median :-152.00 Median : 35.0
## Mean : -5.595 Mean : 30.15 Mean : -72.59 Mean : 55.6
## 3rd Qu.: -5.000 3rd Qu.: 61.00 3rd Qu.: 27.00 3rd Qu.: 59.0
## Max. : 85.000 Max. :164.00 Max. : 105.00 Max. :485.0
##
## magnet_belt_y magnet_belt_z roll_arm pitch_arm
## Min. :354.0 Min. :-623.0 Min. :-180.00 Min. :-88.800
## 1st Qu.:581.0 1st Qu.:-375.0 1st Qu.: -31.77 1st Qu.:-25.900
## Median :601.0 Median :-320.0 Median : 0.00 Median : 0.000
## Mean :593.7 Mean :-345.5 Mean : 17.83 Mean : -4.612
## 3rd Qu.:610.0 3rd Qu.:-306.0 3rd Qu.: 77.30 3rd Qu.: 11.200
## Max. :673.0 Max. : 293.0 Max. : 180.00 Max. : 88.500
##
## yaw_arm total_accel_arm var_accel_arm avg_roll_arm
## Min. :-180.0000 Min. : 1.00 Min. : 0.00 Min. :-166.67
## 1st Qu.: -43.1000 1st Qu.:17.00 1st Qu.: 9.03 1st Qu.: -38.37
## Median : 0.0000 Median :27.00 Median : 40.61 Median : 0.00
## Mean : -0.6188 Mean :25.51 Mean : 53.23 Mean : 12.68
## 3rd Qu.: 45.8750 3rd Qu.:33.00 3rd Qu.: 75.62 3rd Qu.: 76.33
## Max. : 180.0000 Max. :66.00 Max. :331.70 Max. : 163.33
## NA's :19216 NA's :19216
## stddev_roll_arm var_roll_arm avg_pitch_arm stddev_pitch_arm
## Min. : 0.000 Min. : 0.000 Min. :-81.773 Min. : 0.000
## 1st Qu.: 1.376 1st Qu.: 1.898 1st Qu.:-22.770 1st Qu.: 1.642
## Median : 5.702 Median : 32.517 Median : 0.000 Median : 8.133
## Mean : 11.201 Mean : 417.264 Mean : -4.901 Mean :10.383
## 3rd Qu.: 14.921 3rd Qu.: 222.647 3rd Qu.: 8.277 3rd Qu.:16.327
## Max. :161.964 Max. :26232.208 Max. : 75.659 Max. :43.412
## NA's :19216 NA's :19216 NA's :19216 NA's :19216
## var_pitch_arm avg_yaw_arm stddev_yaw_arm
## Min. : 0.000 Min. :-173.440 Min. : 0.000
## 1st Qu.: 2.697 1st Qu.: -29.198 1st Qu.: 2.577
## Median : 66.146 Median : 0.000 Median : 16.682
## Mean : 195.864 Mean : 2.359 Mean : 22.270
## 3rd Qu.: 266.576 3rd Qu.: 38.185 3rd Qu.: 35.984
## Max. :1884.565 Max. : 152.000 Max. :177.044
## NA's :19216 NA's :19216 NA's :19216
## var_yaw_arm gyros_arm_x gyros_arm_y
## Min. : 0.000 Min. :-6.37000 Min. :-3.4400
## 1st Qu.: 6.642 1st Qu.:-1.33000 1st Qu.:-0.8000
## Median : 278.309 Median : 0.08000 Median :-0.2400
## Mean : 1055.933 Mean : 0.04277 Mean :-0.2571
## 3rd Qu.: 1294.850 3rd Qu.: 1.57000 3rd Qu.: 0.1400
## Max. :31344.568 Max. : 4.87000 Max. : 2.8400
## NA's :19216
## gyros_arm_z accel_arm_x accel_arm_y accel_arm_z
## Min. :-2.3300 Min. :-404.00 Min. :-318.0 Min. :-636.00
## 1st Qu.:-0.0700 1st Qu.:-242.00 1st Qu.: -54.0 1st Qu.:-143.00
## Median : 0.2300 Median : -44.00 Median : 14.0 Median : -47.00
## Mean : 0.2695 Mean : -60.24 Mean : 32.6 Mean : -71.25
## 3rd Qu.: 0.7200 3rd Qu.: 84.00 3rd Qu.: 139.0 3rd Qu.: 23.00
## Max. : 3.0200 Max. : 437.00 Max. : 308.0 Max. : 292.00
##
## magnet_arm_x magnet_arm_y magnet_arm_z kurtosis_roll_arm
## Min. :-584.0 Min. :-392.0 Min. :-597.0 Min. :-1.809
## 1st Qu.:-300.0 1st Qu.: -9.0 1st Qu.: 131.2 1st Qu.:-1.345
## Median : 289.0 Median : 202.0 Median : 444.0 Median :-0.894
## Mean : 191.7 Mean : 156.6 Mean : 306.5 Mean :-0.366
## 3rd Qu.: 637.0 3rd Qu.: 323.0 3rd Qu.: 545.0 3rd Qu.:-0.038
## Max. : 782.0 Max. : 583.0 Max. : 694.0 Max. :21.456
## NA's :19294
## kurtosis_picth_arm kurtosis_yaw_arm skewness_roll_arm skewness_pitch_arm
## Min. :-2.084 Min. :-2.103 Min. :-2.541 Min. :-4.565
## 1st Qu.:-1.280 1st Qu.:-1.220 1st Qu.:-0.561 1st Qu.:-0.618
## Median :-1.010 Median :-0.733 Median : 0.040 Median :-0.035
## Mean :-0.542 Mean : 0.406 Mean : 0.068 Mean :-0.065
## 3rd Qu.:-0.379 3rd Qu.: 0.115 3rd Qu.: 0.671 3rd Qu.: 0.454
## Max. :19.751 Max. :56.000 Max. : 4.394 Max. : 3.043
## NA's :19296 NA's :19227 NA's :19293 NA's :19296
## skewness_yaw_arm max_roll_arm max_picth_arm max_yaw_arm
## Min. :-6.708 Min. :-73.100 Min. :-173.000 Min. : 4.00
## 1st Qu.:-0.743 1st Qu.: -0.175 1st Qu.: -1.975 1st Qu.:29.00
## Median :-0.133 Median : 4.950 Median : 23.250 Median :34.00
## Mean :-0.229 Mean : 11.236 Mean : 35.751 Mean :35.46
## 3rd Qu.: 0.344 3rd Qu.: 26.775 3rd Qu.: 95.975 3rd Qu.:41.00
## Max. : 7.483 Max. : 85.500 Max. : 180.000 Max. :65.00
## NA's :19227 NA's :19216 NA's :19216 NA's :19216
## min_roll_arm min_pitch_arm min_yaw_arm amplitude_roll_arm
## Min. :-89.10 Min. :-180.00 Min. : 1.00 Min. : 0.000
## 1st Qu.:-41.98 1st Qu.: -72.62 1st Qu.: 8.00 1st Qu.: 5.425
## Median :-22.45 Median : -33.85 Median :13.00 Median : 28.450
## Mean :-21.22 Mean : -33.92 Mean :14.66 Mean : 32.452
## 3rd Qu.: 0.00 3rd Qu.: 0.00 3rd Qu.:19.00 3rd Qu.: 50.960
## Max. : 66.40 Max. : 152.00 Max. :38.00 Max. :119.500
## NA's :19216 NA's :19216 NA's :19216 NA's :19216
## amplitude_pitch_arm amplitude_yaw_arm roll_dumbbell pitch_dumbbell
## Min. : 0.000 Min. : 0.00 Min. :-153.71 Min. :-149.59
## 1st Qu.: 9.925 1st Qu.:13.00 1st Qu.: -18.49 1st Qu.: -40.89
## Median : 54.900 Median :22.00 Median : 48.17 Median : -20.96
## Mean : 69.677 Mean :20.79 Mean : 23.84 Mean : -10.78
## 3rd Qu.:115.175 3rd Qu.:28.75 3rd Qu.: 67.61 3rd Qu.: 17.50
## Max. :360.000 Max. :52.00 Max. : 153.55 Max. : 149.40
## NA's :19216 NA's :19216
## yaw_dumbbell kurtosis_roll_dumbbell kurtosis_picth_dumbbell
## Min. :-150.871 Min. :-2.174 Min. :-2.200
## 1st Qu.: -77.644 1st Qu.:-0.682 1st Qu.:-0.721
## Median : -3.324 Median :-0.033 Median :-0.133
## Mean : 1.674 Mean : 0.452 Mean : 0.286
## 3rd Qu.: 79.643 3rd Qu.: 0.940 3rd Qu.: 0.584
## Max. : 154.952 Max. :54.998 Max. :55.628
## NA's :19221 NA's :19218
## kurtosis_yaw_dumbbell skewness_roll_dumbbell skewness_pitch_dumbbell
## Mode:logical Min. :-7.384 Min. :-7.447
## NA's:19622 1st Qu.:-0.581 1st Qu.:-0.526
## Median :-0.076 Median :-0.091
## Mean :-0.115 Mean :-0.035
## 3rd Qu.: 0.400 3rd Qu.: 0.505
## Max. : 1.958 Max. : 3.769
## NA's :19220 NA's :19217
## skewness_yaw_dumbbell max_roll_dumbbell max_picth_dumbbell
## Mode:logical Min. :-70.10 Min. :-112.90
## NA's:19622 1st Qu.:-27.15 1st Qu.: -66.70
## Median : 14.85 Median : 40.05
## Mean : 13.76 Mean : 32.75
## 3rd Qu.: 50.58 3rd Qu.: 133.22
## Max. :137.00 Max. : 155.00
## NA's :19216 NA's :19216
## max_yaw_dumbbell min_roll_dumbbell min_pitch_dumbbell min_yaw_dumbbell
## Min. :-2.20 Min. :-149.60 Min. :-147.00 Min. :-2.20
## 1st Qu.:-0.70 1st Qu.: -59.67 1st Qu.: -91.80 1st Qu.:-0.70
## Median : 0.00 Median : -43.55 Median : -66.15 Median : 0.00
## Mean : 0.45 Mean : -41.24 Mean : -33.18 Mean : 0.45
## 3rd Qu.: 0.90 3rd Qu.: -25.20 3rd Qu.: 21.20 3rd Qu.: 0.90
## Max. :55.00 Max. : 73.20 Max. : 120.90 Max. :55.00
## NA's :19221 NA's :19216 NA's :19216 NA's :19221
## amplitude_roll_dumbbell amplitude_pitch_dumbbell amplitude_yaw_dumbbell
## Min. : 0.00 Min. : 0.00 Min. :0
## 1st Qu.: 14.97 1st Qu.: 17.06 1st Qu.:0
## Median : 35.05 Median : 41.73 Median :0
## Mean : 55.00 Mean : 65.93 Mean :0
## 3rd Qu.: 81.04 3rd Qu.: 99.55 3rd Qu.:0
## Max. :256.48 Max. :273.59 Max. :0
## NA's :19216 NA's :19216 NA's :19221
## total_accel_dumbbell var_accel_dumbbell avg_roll_dumbbell
## Min. : 0.00 Min. : 0.000 Min. :-128.96
## 1st Qu.: 4.00 1st Qu.: 0.378 1st Qu.: -12.33
## Median :10.00 Median : 1.000 Median : 48.23
## Mean :13.72 Mean : 4.388 Mean : 23.86
## 3rd Qu.:19.00 3rd Qu.: 3.434 3rd Qu.: 64.37
## Max. :58.00 Max. :230.428 Max. : 125.99
## NA's :19216 NA's :19216
## stddev_roll_dumbbell var_roll_dumbbell avg_pitch_dumbbell
## Min. : 0.000 Min. : 0.00 Min. :-70.73
## 1st Qu.: 4.639 1st Qu.: 21.52 1st Qu.:-42.00
## Median : 12.204 Median : 148.95 Median :-19.91
## Mean : 20.761 Mean : 1020.27 Mean :-12.33
## 3rd Qu.: 26.356 3rd Qu.: 694.65 3rd Qu.: 13.21
## Max. :123.778 Max. :15321.01 Max. : 94.28
## NA's :19216 NA's :19216 NA's :19216
## stddev_pitch_dumbbell var_pitch_dumbbell avg_yaw_dumbbell
## Min. : 0.000 Min. : 0.00 Min. :-117.950
## 1st Qu.: 3.482 1st Qu.: 12.12 1st Qu.: -76.696
## Median : 8.089 Median : 65.44 Median : -4.505
## Mean :13.147 Mean : 350.31 Mean : 0.202
## 3rd Qu.:19.238 3rd Qu.: 370.11 3rd Qu.: 71.234
## Max. :82.680 Max. :6836.02 Max. : 134.905
## NA's :19216 NA's :19216 NA's :19216
## stddev_yaw_dumbbell var_yaw_dumbbell gyros_dumbbell_x
## Min. : 0.000 Min. : 0.00 Min. :-204.0000
## 1st Qu.: 3.885 1st Qu.: 15.09 1st Qu.: -0.0300
## Median : 10.264 Median : 105.35 Median : 0.1300
## Mean : 16.647 Mean : 589.84 Mean : 0.1611
## 3rd Qu.: 24.674 3rd Qu.: 608.79 3rd Qu.: 0.3500
## Max. :107.088 Max. :11467.91 Max. : 2.2200
## NA's :19216 NA's :19216
## gyros_dumbbell_y gyros_dumbbell_z accel_dumbbell_x accel_dumbbell_y
## Min. :-2.10000 Min. : -2.380 Min. :-419.00 Min. :-189.00
## 1st Qu.:-0.14000 1st Qu.: -0.310 1st Qu.: -50.00 1st Qu.: -8.00
## Median : 0.03000 Median : -0.130 Median : -8.00 Median : 41.50
## Mean : 0.04606 Mean : -0.129 Mean : -28.62 Mean : 52.63
## 3rd Qu.: 0.21000 3rd Qu.: 0.030 3rd Qu.: 11.00 3rd Qu.: 111.00
## Max. :52.00000 Max. :317.000 Max. : 235.00 Max. : 315.00
##
## accel_dumbbell_z magnet_dumbbell_x magnet_dumbbell_y magnet_dumbbell_z
## Min. :-334.00 Min. :-643.0 Min. :-3600 Min. :-262.00
## 1st Qu.:-142.00 1st Qu.:-535.0 1st Qu.: 231 1st Qu.: -45.00
## Median : -1.00 Median :-479.0 Median : 311 Median : 13.00
## Mean : -38.32 Mean :-328.5 Mean : 221 Mean : 46.05
## 3rd Qu.: 38.00 3rd Qu.:-304.0 3rd Qu.: 390 3rd Qu.: 95.00
## Max. : 318.00 Max. : 592.0 Max. : 633 Max. : 452.00
##
## roll_forearm pitch_forearm yaw_forearm
## Min. :-180.0000 Min. :-72.50 Min. :-180.00
## 1st Qu.: -0.7375 1st Qu.: 0.00 1st Qu.: -68.60
## Median : 21.7000 Median : 9.24 Median : 0.00
## Mean : 33.8265 Mean : 10.71 Mean : 19.21
## 3rd Qu.: 140.0000 3rd Qu.: 28.40 3rd Qu.: 110.00
## Max. : 180.0000 Max. : 89.80 Max. : 180.00
##
## kurtosis_roll_forearm kurtosis_picth_forearm kurtosis_yaw_forearm
## Min. :-1.879 Min. :-2.098 Mode:logical
## 1st Qu.:-1.398 1st Qu.:-1.376 NA's:19622
## Median :-1.119 Median :-0.890
## Mean :-0.689 Mean : 0.419
## 3rd Qu.:-0.618 3rd Qu.: 0.054
## Max. :40.060 Max. :33.626
## NA's :19300 NA's :19301
## skewness_roll_forearm skewness_pitch_forearm skewness_yaw_forearm
## Min. :-2.297 Min. :-5.241 Mode:logical
## 1st Qu.:-0.402 1st Qu.:-0.881 NA's:19622
## Median : 0.003 Median :-0.156
## Mean :-0.009 Mean :-0.223
## 3rd Qu.: 0.370 3rd Qu.: 0.514
## Max. : 5.856 Max. : 4.464
## NA's :19299 NA's :19301
## max_roll_forearm max_picth_forearm max_yaw_forearm min_roll_forearm
## Min. :-66.60 Min. :-151.00 Min. :-1.900 Min. :-72.500
## 1st Qu.: 0.00 1st Qu.: 0.00 1st Qu.:-1.400 1st Qu.: -6.075
## Median : 26.80 Median : 113.00 Median :-1.100 Median : 0.000
## Mean : 24.49 Mean : 81.49 Mean :-0.689 Mean : -0.167
## 3rd Qu.: 45.95 3rd Qu.: 174.75 3rd Qu.:-0.600 3rd Qu.: 12.075
## Max. : 89.80 Max. : 180.00 Max. :40.100 Max. : 62.100
## NA's :19216 NA's :19216 NA's :19300 NA's :19216
## min_pitch_forearm min_yaw_forearm amplitude_roll_forearm
## Min. :-180.00 Min. :-1.900 Min. : 0.000
## 1st Qu.:-175.00 1st Qu.:-1.400 1st Qu.: 1.125
## Median : -61.00 Median :-1.100 Median : 17.770
## Mean : -57.57 Mean :-0.689 Mean : 24.653
## 3rd Qu.: 0.00 3rd Qu.:-0.600 3rd Qu.: 39.875
## Max. : 167.00 Max. :40.100 Max. :126.000
## NA's :19216 NA's :19300 NA's :19216
## amplitude_pitch_forearm amplitude_yaw_forearm total_accel_forearm
## Min. : 0.0 Min. :0 Min. : 0.00
## 1st Qu.: 2.0 1st Qu.:0 1st Qu.: 29.00
## Median : 83.7 Median :0 Median : 36.00
## Mean :139.1 Mean :0 Mean : 34.72
## 3rd Qu.:350.0 3rd Qu.:0 3rd Qu.: 41.00
## Max. :360.0 Max. :0 Max. :108.00
## NA's :19216 NA's :19300
## var_accel_forearm avg_roll_forearm stddev_roll_forearm
## Min. : 0.000 Min. :-177.234 Min. : 0.000
## 1st Qu.: 6.759 1st Qu.: -0.909 1st Qu.: 0.428
## Median : 21.165 Median : 11.172 Median : 8.030
## Mean : 33.502 Mean : 33.165 Mean : 41.986
## 3rd Qu.: 51.240 3rd Qu.: 107.132 3rd Qu.: 85.373
## Max. :172.606 Max. : 177.256 Max. :179.171
## NA's :19216 NA's :19216 NA's :19216
## var_roll_forearm avg_pitch_forearm stddev_pitch_forearm
## Min. : 0.00 Min. :-68.17 Min. : 0.000
## 1st Qu.: 0.18 1st Qu.: 0.00 1st Qu.: 0.336
## Median : 64.48 Median : 12.02 Median : 5.516
## Mean : 5274.10 Mean : 11.79 Mean : 7.977
## 3rd Qu.: 7289.08 3rd Qu.: 28.48 3rd Qu.:12.866
## Max. :32102.24 Max. : 72.09 Max. :47.745
## NA's :19216 NA's :19216 NA's :19216
## var_pitch_forearm avg_yaw_forearm stddev_yaw_forearm
## Min. : 0.000 Min. :-155.06 Min. : 0.000
## 1st Qu.: 0.113 1st Qu.: -26.26 1st Qu.: 0.524
## Median : 30.425 Median : 0.00 Median : 24.743
## Mean : 139.593 Mean : 18.00 Mean : 44.854
## 3rd Qu.: 165.532 3rd Qu.: 85.79 3rd Qu.: 85.817
## Max. :2279.617 Max. : 169.24 Max. :197.508
## NA's :19216 NA's :19216 NA's :19216
## var_yaw_forearm gyros_forearm_x gyros_forearm_y
## Min. : 0.00 Min. :-22.000 Min. : -7.02000
## 1st Qu.: 0.27 1st Qu.: -0.220 1st Qu.: -1.46000
## Median : 612.21 Median : 0.050 Median : 0.03000
## Mean : 4639.85 Mean : 0.158 Mean : 0.07517
## 3rd Qu.: 7368.41 3rd Qu.: 0.560 3rd Qu.: 1.62000
## Max. :39009.33 Max. : 3.970 Max. :311.00000
## NA's :19216
## gyros_forearm_z accel_forearm_x accel_forearm_y accel_forearm_z
## Min. : -8.0900 Min. :-498.00 Min. :-632.0 Min. :-446.00
## 1st Qu.: -0.1800 1st Qu.:-178.00 1st Qu.: 57.0 1st Qu.:-182.00
## Median : 0.0800 Median : -57.00 Median : 201.0 Median : -39.00
## Mean : 0.1512 Mean : -61.65 Mean : 163.7 Mean : -55.29
## 3rd Qu.: 0.4900 3rd Qu.: 76.00 3rd Qu.: 312.0 3rd Qu.: 26.00
## Max. :231.0000 Max. : 477.00 Max. : 923.0 Max. : 291.00
##
## magnet_forearm_x magnet_forearm_y magnet_forearm_z classe
## Min. :-1280.0 Min. :-896.0 Min. :-973.0 A:5580
## 1st Qu.: -616.0 1st Qu.: 2.0 1st Qu.: 191.0 B:3797
## Median : -378.0 Median : 591.0 Median : 511.0 C:3422
## Mean : -312.6 Mean : 380.1 Mean : 393.6 D:3216
## 3rd Qu.: -73.0 3rd Qu.: 737.0 3rd Qu.: 653.0 E:3607
## Max. : 672.0 Max. :1480.0 Max. :1090.0
##
Exploratory box-plots for all the features
numeric_or_not <- sapply(training_Data, is.numeric)
numeric_vars <- names(training_Data)[numeric_or_not]
featurePlot(
x = training_Data %>% select(all_of(numeric_vars)),
y = training_Data$classe,
plot = "box",
mar =c(0,0,0,0),
## Pass in options to bwplot()
scales = list(y = list(relation = "free")),
layout = c(6, round(length(numeric_vars)/5)),
auto.key = list(columns = 2),
par.strip.text = list(cex = 0.75)
)
Density plots for the features
featurePlot(
x = training_Data %>% select(all_of(numeric_vars)),
y = training_Data$classe,
plot = "density",
## Pass in options to xyplot() to
## make it prettier
scales = list(
x = list(relation = "free"),
y = list(relation = "free")
),
adjust = 1.5,
pch = "|",
layout = c(6, round(length(numeric_vars) / 5)),
auto.key = list(columns = 5),
par.strip.text = list(cex = 0.75)
)
